Lecture 16

Question 1

What is the limbic system linked to?

Answer 1

ANS

Question 2

Where is the limbic system?

Answer 2

On the medial rim of the inferior cerebral hemispheres

Question 3

What are the structures associated with the limbic system?

Answer 3

Cingulate gyrus
Parahippocampal gyrus
Septal area
Hippocampus and dentate gyrus
Amygdala
Anterior thalamic nuclei
Hypothalmus

Question 4

What is involved in the hippocampal formation?

Answer 4

Hippocampus, Dentate gyrus, Parts of parahippocampal gyrus and subiculum

Question 5

How is the hippocampus formed?

Answer 5

Infolding of the inferomedial part of the temporal lobe into the inferior horn of the lateral ventricle

Question 6

What cell layer is in the hippocampus?

Answer 6

Pyramidal cell layer

Question 7

What does the hippocampus receive input from?

Answer 7

Adjacent inferior temporal cortex

contralateral hippocampus Fibres arising in the cingulate gyrus

Question 8

Where does the hippocampus send fibres to?

Answer 8

Mammillary body via fornix

Question 9

What does the maxillary body project to?

Answer 9

Anterior thalamus

Question 10

What does the circuit of papez include?

Answer 10

Hippocampus, fornix, mammillary body, anterior thalamic nuclei, cingulate gyrus and parahippocampal gyri

Question 11

What is the circuit of papez?

Answer 11

A closed circuit linking the hippocampus with the cingulate cortex via mammillary bodies

Question 12

What is the fornix?

Answer 12

White matter structure connecting the hippocampus to the maxillary bodies

Question 13

What does the fornix consist of?

Answer 13

Crura and body

Question 14

What joins the body of the fornix?

Answer 14

Crura

Question 15

What is the cingulum?

Answer 15

A white matter tract that forms part of the circuit of papez

Question 16

What controls memory?

Answer 16

Hippocampus

Question 17

What serves as the main integrator of the autonomic and endocrine systems?

Answer 17

Hypothalamus

Question 18

What does the hypothalamus receive input from?

Answer 18

Hippocampus,
Visceral afferents,
Somatosensory afferents,
Olfactory system

Question 19

Efferents of the hypothalamus reach?

Answer 19

Largest efferent bundle goes to anterior thalamus

Vagal nuclei

Question 20

What is the main brain centre for regulation of the ANS?

Answer 20

Hypothalamus

Question 21

Posterior hypothalamus is associated with?

Answer 21

Sympathetic activation

Question 22

Anterior hypothalamus is associated with?

Answer 22

Parasympathetic activation

Question 23

Where is the amygdala found?

Answer 23

Near the temporal pole

Question 24

What does the amygdala receive inputs from?

Answer 24

Olfactory bulb, temporal cortex, septum, thalamus and brain stem

Question 25

Where does the amygdala send outputs?

Answer 25

Hypothalamus and septum via stria terminalis

Question 26

What are the two divisions of the amygdala?

Answer 26

Ventrolateral and dorsomedial

Question 27

What does the olfactory system consist of?

Answer 27

Olfactory epithelium, olfactory nerves, olfactory bulbs, olfactory tracts, associated cerebral cortex

Question 28

What are the three cell types of the olfactory epithelium?

Answer 28

Olfactory receptor cells Support cells Basal cells

Question 29

What are the basal cells?

Answer 29

stem cells